The Night Country
With Finch's help, Alice escaped the Hinterland and the dark legacy of her reclusive grandmother, Althea Proserpine. Now she and the other stranded refugees of the fairy-tale world are trying to build unmagical lives in New York City. But someone, or something, is killing off the Hinterland's survivors one by one, and Alice suspects their deaths aren't random. Meanwhile, back in the winking-out remains of the Hinterland, Finch searches for a way home while the story-world itself unravels around him. The sequel to The Hazel Wood continues Alice's fight to separate herself from the stories that made her.
Escaped the Hinterland and now tries to build a normal life in New York while its survivors are hunted.
Alice's ally, stranded in the collapsing remains of the Hinterland while searching for a way home.
You need to read The Hazel Wood first. The Night Country is a direct sequel that continues Alice's story and assumes you already know the Hinterland, its characters, and the ending of the first book.